7-years-old male crossbreed with acute non-ambulatory tetraparesis. A cervical MRI was performed.
Description
There is a decrease in volume and signal intensity of the nucleus pulposus at the intervertebral disc space of C3-C4 (green arrow). At this level, there is a small extradural lesion with a minimal amount hypointense material on T2W located at the ventral and central aspect of the vertebral canal (orange arrows). This material extends cranially and towards the left at the caudal aspect of C3. It occupies approximately 10% of the diameter of the vertebral canal and slightly displaces the spinal cord. There is also a mild attenuation of the dorsal subarachnoid space at the caudal aspect of C3. In addition, there is an intramedullary hyperintense lesion on T2W, dorsal to the intervertebral space, running from the caudal aspect of C3 to the medial aspect of C4, mainly lateralized to the left, occupying approximately 50% of the diameter of the spinal cord (pink arrows). There are no areas of signal void on the T2*.
There is a decrease signal intensity on T2W of the nucleus pulposus at the intervertebral disc space of C2-C3 (orange arrow). However, the intervertebral disc preserves a normal position and there are no significant lesions at the spinal cord or in the vertebral canal.
Diagnosis
- Interverbal disc space of C3-C4:
- Acute non-compressive nucleus pulposus extrusion (low volume-high velocity herniation), with a mild amount of extradural material lateralized to the left at the caudal aspect of the C3, without evidence of compressive myelopathy.
- Intramedullary lesion, lateralized to the left, extending from the caudal aspect of C3 to the cranial aspect of the C4, consistent with an area of spinal cord contusion/inflammation.
- Degeneration of the intervertebral disc of C2-C3, with normal position – incidental finding.
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